Collapsible box



2- Sheets-Sheet. 2

H. B. WALTER COLLAPSIBLE BOX Filed D60. 12. 1924 Jan. 17, 1928.

Patented Jan. 17, 1928.

UNITED I STATES PATENT OFFICE.

HARRISON B. WALTER, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS,

T` CONTAINER CORPORATION OF AMERICA, OF CHICAGO, ILLINOIS, A CORPORA- 'rIoN or DELAWARE.

COLLAPSIBLE BOX.

Application led December 12, 1924. Serial No. 755,363.

This invention relates to improvements in colla sible boxes made of fibre or paper boar and consists of the matters hereinafter described and more particularly polnted out in the appended claims.

The invention relates to that type of collapsible box (commonly known as a suit box) which comprises two sect1ons,a body section and a cover section adapted to embrace and close upon the body section. Each section is made from a single blank cut and creased so that it may be set up in box form with the connecting parts stapled or riveted together at the factory. Suitable creases are provided in the end or short side walls of the boxy to permit them to be folded down upon the bottom wall of the box with the .longer side walls folded down upon the said end walls. Boxes of the kind as at present constructed, necessarily present a flexibility and lack of rigidity in the end Walls when set u on account of the aforesaid creases, whic permit the box sections to be collapsed for shipping.

The object of the present 1nvent1on 1s to produce a box of the kind, in which the end walls are so reinforced and braced in the neighborhood of the creases, that, notwlthstanding the boxmay be readily collapsed as heretofore, said end walls present the same rigidity against outward strain as they would if the creases were not present.

Another object of the invention is to produce a box ofthe kind possessmg the 1mproved feature above described, with the same economy of material and the same simplic'ity of setting u and lfinishing as maintains in the prior oxes wlthout such feature.

4o The advantages of the invention will appear more clearly as I proceed with my specification.

In the drawings Figure 1 is a plan view of a blank suitably cut and creased to form one section of my improved box. It will be understood that the blanks for the two box sections are identical, except that the blank for the cover section is of slightly larger dimensions in order that it may fit over and embrace the body section.

lFigure 2 is a perspective view of the iinished box section as 1t appears when set up with the parts connecting the sides and ends stapled or riveted together.

Figure 3 is a view representing the box section as it appears when the sides and ends are collapsed for shipment.

Figure 4 is a perspective View of the box including both the body section and the cover section when packed and closed.

Referring now to that embodiment of the invention illustrated in the drawings z-lO indicates a blank of fibre or paper board properly cut and creased to form one of the box sections of the improved box. Said blank has a main part l1, which constitutes the bottom wall or top wall of the box depending upon which box section the blank is designed for. 12, l2 indicate the parts of the blank which are to constitute the longer or side Walls of the box section; and 13, 13 indicate the parts of the blankwhich are to constitute the shorter or end walls ofthe section. The bottom wall part l1, the side wall parts 12, and the end wall parts 13 are defined by parallel, laterally spaced, longitudinal crease lines 14, 14 and byv parallel, longitudinally spaced, transverse crease lines 15, 15. The several crease lines 14 and 15 are preferably formed on the top or obverse face of the blank so as to provide for the folding of the side parts 12 and of the end parts 13 upwardly into positions at ri ht angles to the main part4 11 of the blank. he

crease lines 14 and 15 are prolonged beyond the limits of the main blank part 11 to the edges of the blank as indicated at 14l and 15. Said rolongations 14, 15a, together with the adyacent edges of the blank, define square corner pieces 16 in the four corners of the blank. 17, 17 indicate crease lines in the end wall parts 13 of the blank. Said crease lines are preferably formed on the reverse or bottom side of the blank and begin at the several corners of the main part 11 of the blank and run toward the median line of the blank at an angle of 45 degrees,ter minating in the edges of the end parts 13, 13.

Each corner piece 16 is cut into two unequal parts on ay line 18 beginning at the corner of the main blank part 11 and running to a point 19 in the end edge of the blank. Said point 19 is spaced from the corner of the corner iece a short distance as illustrated, so that the corner piece is divided into a comparatively narrow triangular piece 20 which is integral with an end part 13 of the blank and a wider rhomboidal piece 21, which is integral with a side part 12.

The box section is set up by folding the side parts 12, 12 and the end parts 13, 13 into upright or right an lar position with reference to the main b ank part 11, with the rhomboidal ieces 21 engaged a ainst the inner faces o? the end parts 13 am? with the triangular pieces 20 engaged against the outer faces of the side parts 12, as illus trated in Figure 2. The trian ular pieces 20 are secured to the respective side parts 12 by means of staples or rivets located adjacent the edge of the said triangular` pieces as indicated at 22. The rhomboidal pieces 21 are secured to the end pieces 13 by staples 23 placed in a line parallel to but above the crease lines 17.

It will be noted that a part of each piece 421 (attached to a part 13) extends below the proximate crease line 17 in said end wall. Thus, when the box is set up and stapled, as illustrated in Figure 2, the said part will act as a brace to prevent a flexing of the end wall along the crease line 17 in a direction to bend said end wall outwardly, as when subjected to strain from the inside of the box. On the other hand, the said part will in no way interfere with that iexing of the end wall required to fold said end wall downwardly toward the bottom wall part 11, since the line of the staples 23 is above the crease line 17. Thus the box section may manifestly be readily collapsed as illustrated in Figure 3. n

It will be apparent to those familiar with the art that the improved feature of construction hereinbefore described, is brought about without the use of any more material than in the manufacture of boxes of the kind heretofore made, since the only change required in making the blank for the new box is to make the cut dividing the corner pieces into a narrow triangular piece and a wider rhomboidal piece, whereas, in the earlier boxes these corner pieces were divided into eual triangular parts.

While in escribing my `invention I have referred to certain details of construction and arrangement of parts, it is to be understood that the invention is in no way limited thereto except as may be pointed out in the appended claims.

I claim as my invention:

1. A collapsible box section comprising a main wall part and two side and two end wall parts, the end wall parts being provided with creases to permit them to collapse, with the side wall parts, upon the main wall part, the end wall arts having narrow end pieces each attached to the outside face of the proximate end of a side wall part, and the side wall parts having wider end pieces each attached to the inner face of the proximate end of an endv wall part, said wider ieces overlapping the aforesaid creases and eing free ot' attachment below said creases.

2. A collapsible box section comprising a main wall part and' two side and two end. wall parts, the end wall parts being provided wth creases to permit them to collapse, with the side Wall parts, upon the main wall part, the end wall parts havingr narrow triangular end ieces, each attached to the outside face of tie proximate end of ar sidewall part, and the side wall parts having wider, rhomboidal end pieces, each attached to the inner face of the proximate end of an end wall part, said rhomboidal pieces overlapping the aforesaid creases and being attached to the end wall parts above said creases, but being free of attachment below said creases.

In testimony that I claim the foregoing as my invention, I affix my signature this 4th day of December, 1924.

HARRISON B. WALTER. 

